Push API: use (un)subscription instead of (un)registration

content/public/browser/push_messaging_service.h

Index: content/public/browser/push_messaging_service.h
diff --git a/content/public/browser/push_messaging_service.h b/content/public/browser/push_messaging_service.h
index d772f45091ad970c03731ce870e15908003bac8e..b6845b85b40ed33d7a1505d51a16dbbc0b80dc89 100644
--- a/content/public/browser/push_messaging_service.h
+++ b/content/public/browser/push_messaging_service.h
@@ -40,10 +40,10 @@ class CONTENT_EXPORT PushMessagingService {
   // origins and push registrations.
   virtual GURL GetPushEndpoint() = 0;
 
-  // Register the given |sender_id| with the push messaging service in a
+  // Subscribe the given |sender_id| with the push messaging service in a
   // document context. The frame is known and a permission UI may be displayed
   // to the user.
-  virtual void RegisterFromDocument(const GURL& requesting_origin,
+  virtual void SubscribeFromDocument(const GURL& requesting_origin,
                                     int64 service_worker_registration_id,
                                     const std::string& sender_id,
                                     int renderer_id,
@@ -51,19 +51,19 @@ class CONTENT_EXPORT PushMessagingService {
                                     bool user_visible,
                                     const RegisterCallback& callback) = 0;
 
-  // Register the given |sender_id| with the push messaging service. The frame
+  // Subscribe the given |sender_id| with the push messaging service. The frame
   // is not known so if permission was not previously granted by the user this
   // request should fail.
-  virtual void RegisterFromWorker(const GURL& requesting_origin,
+  virtual void SubscribeFromWorker(const GURL& requesting_origin,
                                   int64 service_worker_registration_id,
                                   const std::string& sender_id,
                                   bool user_visible,
                                   const RegisterCallback& callback) = 0;
 
-  // Unregister the given |sender_id| from the push messaging service. The
-  // registration will be synchronously deactivated locally, and asynchronously
+  // Unsubscribe the given |sender_id| from the push messaging service. The
+  // subscription will be synchronously deactivated locally, and asynchronously
   // sent to the push service, with automatic retry.
-  virtual void Unregister(const GURL& requesting_origin,
+  virtual void Unsubscribe(const GURL& requesting_origin,
                           int64 service_worker_registration_id,
                           const std::string& sender_id,
                           const UnregisterCallback& callback) = 0;
@@ -103,9 +103,9 @@ class CONTENT_EXPORT PushMessagingService {
                           int64 service_worker_registration_id,
                           const StringCallback& callback);
 
-  // Clear the push registration id stored in the service worker with the given
+  // Clear the push subscription id stored in the service worker with the given
   // |service_worker_registration_id| for the given |origin|.
-  static void ClearPushRegistrationID(BrowserContext* browser_context,
+  static void ClearPushSubscriptionID(BrowserContext* browser_context,
                                       const GURL& origin,
                                       int64 service_worker_registration_id,
                                       const base::Closure& callback);